2026-05-06 (first published: 2025-04-16)
1,716 reads
Articles
SQL Server Table-Valued Parameter Join Issues in Stored Procedures
Learn how table valued parameter joins in SQL Server stored procedures can negatively impact query performance.
2026-05-06
SSC Spam
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2026-05-05
77 reads
What is New in SQL Server 2025
Learn about the latest version of SQL Server and get help installing it on your system.
2026-05-04
7,750 reads
How to pass Microsoft certification exams: tips and guidance
In my previous article, I discussed how to prepare for Microsoft certification exams. In this article, I’m covering what you should do when actually taking the exams.
2026-05-04
Understanding Deadlock Victim Selection in SQL Server
A short introduction to how deadlocks work and how you can affect their behavior inside your system.
2026-05-01
2,738 reads
Net Present Value and Internal Rate of Return in SQL Server
Many organizations store cash-flow data inside SQL Server and decision-makers often need metrics like Net Present Value (NPV) and Internal Rate of Return (IRR) to evaluate those cash flows. Is it possible to calculate NPV and IIR values in SQL Server without the use of external tools?
2026-05-01
T-SQL Trigonometric Functions in SQL Server
Introduction SQL Server includes several built-in mathematical functions that allow developers to perform complex calculations directly within queries. Among these are trigonometric functions such as SIN(), COS(), and TAN(), which are useful in scenarios involving engineering calculations, geographic data processing, simulations, and analytics. Although these functions are straightforward to use, developers occasionally encounter unexpected results […]
2026-04-29
2,351 reads
How Multi-Column Statistics Work
The short answer: in the real world, only the first column works. When SQL Server needs data about the second column, it builds its own stats on that column instead (assuming they don’t already exist), and uses those two statistics together – but they’re not really correlated.
2026-04-29
T-SQL in SQL Server 2025: JSON_ARRAYAGG
Learn how the JSON_ARRAYAGG() function works in SQL Server 2025.
2026-04-27
4,144 reads
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Question of the Day
BIT_COUNT II
In SQL Server 2025, I have a table (dbo.UserPermission) that contains this data:
UserID UserPermissions 15 23 37 4 NULLWhat is returned when I run this code:
select bit_count(UserPermissions) as PermissionCount from dbo.UserPermission where UserID = 4;See possible answers